Process and apparatus for the treatment of benzol and the like.



MJW. BLYTH AND Thv. MILES; PROCESS'AND APPARATUS FOR THE TREATMENT OF B ENZOL AND THE LIKE.

APPLICATTON HLED DE.23. \9l84 If? [a .7 v

Train stares?v PATENT carrot. 1

MEREDITH WYNTIER IBLYTH AND THOMASVIVIAN MILES, SHEFFIELD, ENGLAND.

rn'oonss Am) arrsaarrus son THE TREATMENT or BENZOL AND THE LIKE.

soasao.

S'pecificationof Letters Pateht.

Application filed December 23, 1918. Serial No. 268,074.

To all whom it may concern:

Be it known that We, MEREDITH WYNTER BLYTH and THoMAs VIVIAN MI LEs, both of Sheffield, in the county of York, England, and both subjects of the King of Great Britain, have invented a new anduseful Process and Apparatusfor the Treatment of Benzol and the like, of which the following is a specification.

This invention relates to an improved process and apparatus for washing or purifying benzol and other oils such as petroleum or paraffin, carbolic acid and tar acids generally.

In washing or purifying, for; example, benzol, it is usual to agitate the unpurified benzol with added predetermined quantities of sulfuric acid, water, soda solution, and water, in succession, the agitation being effected intermittently in separate tanks by mechanical stirrers or the like. V

The object of this invention is to provide an improved process and apparatus for washing benzol or other liquids, wherein, the unpurified liquid is admitted to the ap paratuswithout interruption and "is 'con ducted through a series of vessels Where it is brought into contact with. the purify ing reagents and is finally discharged from the apparatus in a continuous stream/ In this apparatus the use of mechanical stirrers or agitators is avoided. i Y

According to this invention,

age vessel to a tank furnished withl-'-controlled outlets one of which cond rgts the liquid to the upper end of a coil of pipesor trolled outlets are adjusted so that the liquid and the reagent are supplied in predetermined proportions to the coil through which they pass by gravitation into a receiver wherethe spent reagent is removed by decantation and the partly washedor purified liquid flows over into another vessel where it is subjected to treatment with water orv another reagent by being admitted to this vessel below the surface of the reagent contained therein, separated by decantation,

completed.-

theliquid to be purified is-supp-lied from a suitable storand so on until the washing or purifying is v Washing vessel n which it eknters'at a point v v The improved process and apparatus may .be employed for washing 0r purifying benzol, petroleum or paraffin with sulfuric'acid,

soda, or the like; for the extraction of car-' bolic acid and tar'acids generally from coal ta-r by means of soda; for the purification of low temperature ta-rlfrom unsaturated hydrocarbons by means of sulfuric acid; and

, for the treatment of other materials susceptible to such processes.

The invention is hereinafter describedby way of example, in its application to the washing and purifying of benzol and the accompanying drawing shows a diagram matic elevation of a plant for this purpose.

Patented June a is is.

As shown inthis drawing a is a storage tank connected by'a pipe b to a regulating tank 0 provided with two outlets controlled by valves 03 or similar devices, one of which controls the flow of benzol to the upper end ofa coiled or convoluted pipe .6 and the other valve controls the flow of benzol to av tank containing sulfuric acid or 'otherreagent. The lower part of this.tank f is con-' nected by an overflow end .ofthe said-pipe e.

If now the valves 03 are opened benzol will flow from the tank 0 directly into the pipe e pipe 9 tovthe upper throu h the pipe h and at the sametime benzo will'flow through the pipe 2' to the tank 7 and accumulate .on the surface of the reagent contained therein whereby an amount of the reagent corresponding to the weight of benzol thus admitted to the tank f will be forced out through the overflow pipe into the pipee. Thus the proportions of benzol and sulfuric acid, or other reagent, supplied to the pipe e can be de termmed by suitable adjustment of the valves (1.

If desired the tank f may be duplicated or divided into separate compartments so that when one tank or compartment is emptied of sulfuric acid or other eagent, the other may continue'in use w ile the first is re-charged with the rea ent. The

tank f is provided -'with a gage ass y;

Having passed through thQ COIl e wherein the acid 'or other reagent effects a purifica-.

tion of the benzol flowing along in contact therewith, these materials enter a recelver h from theilower end of which the spent reagent is drawn off through an overflow pipe Z.- The benzol passes from the upper part of this receiver is through a pipe on to a below the level of the 'fying reagent contained therein. The foul water or spent reagent is drawn off from the bottom-of this washing vessel through an overflow pipe 0 and the benzol is drawn off from the top of this vessel through a pipe 9. wardly from the bottom of the vessel n to a sufficient height above the inlet of the pipe m. The benzolpasses successively through a number of such Washing vessels n, n provided with overflow pipes 0, 0 and benzol pipes p, p 'and is finally delivered to a purified benz'ol receivingitank g.

In the arrangement illustrated for the treatment of benzol and Washing vessels at, n, n are supplied with water from a pipe 7' in quantities regulated by valvess, s, and the vessel n is supplied with caustic soda solution from a tank t through a pipe u a under the control of a valve 22-.

proportioning With the apparatus hereinabove described, the' regulating valves cl having been once adjusted, it is only necessary to maintain the supply of unpurified benzol to the tank 0, the supply of sulfuric acid to the tank f, the supply of caustic soda solution to the vessel n and of water to the vessels n, n in order to obtain a continuous flow of purified benzol into the receiving tank 9.

If desired the material treated may be passed in succession through more than one system such as that comprising the tank f and coils e and any number ofwa'shing vessels such as the vessel 01, may beprovided connected one to the other in succession.

water or other ,pur'i The overflow pipe 0 extends up-' What we claim as our invention and desire to secure by Letters Patent is 1. A process for treating liquid livering the mingled liquids from said pipe into a vessel, there causing separation of the liquid and the reagent by decantation, then 7 benzol or the like, which consists in passing theliquid conducting the purifiedliquid to other vessels in succession, delivering the liquid below the surfa e of a washingor cleansing reagent in said vessels, and finally separating the purified liquid by decantation.

2. Apparatus for washing or purifying benzol or the like,'comprising a tank with controlled ouQets one of which conducts the liquid to be purified to the upper end of a coil of piping and the other controlled outlet conducts a proportion of the liquid to a tank containing a purifying reagent which is thereby displaced .and conducted by an overflow pipe to the said coil which delivers the mingled liquid and reagent to a receiver in which they are separatedby decantation andthe partly purified liquid flows toa washing vessel to which it is admitted below the surface of a washing "or purifying reagent contained therein and. ,again separated by decantation.

MEREDITH -VVYNTER BLYTH. THOMAS VIVIAN MILESn 

